A Jar contains white, red and green marbles in the ratios 2: 3: 4. Five more green balls are added to the Jar and the ratios become 2: 3: 5. How many white balls are there in the Jar?

Square RSTU shown below is rotated in a plane about its center in a clockwise direction. The minimum number of degrees necessary for T to be in the position where S is

A store usually sells a certain item at 40% profit. One week the store has a sale, during which the item is sold for 10% less than usual price. During the sale, what is the profit percentage the store makes on each of these items?

What is the volume of a cube with a surface area of 96?

A cubical block of metal weighs 6 pounds. How much will another cube of the same metal weigh if its sides are twice as long?